Stay-bolt structure.



E. l. DODDS.

STAY BOLT STRUCTURE.

LxcATloN HLED APR 2s A 918- Y 1,293,368 Patented Feb. 4, 1919.

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ETHAN I. nonns, or PITTSBURGH, PENNSYLVANIA, AssIGNoR To PLANNERY BOLTCOMPANY, or PITTSBURGH, PENNSYLVANIA.

STAY-BUILT STRUCTURE.

Specification of Letters Patent.

Patented Feb. 4, 1919.

To all whom t may concern.-

Be it known that I, ETHAN I. Dones, a citizen of the United States, anda resident of Pittsburgh, `in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inStay-Bolt Structures; and I do hereby declare the following to beaffull, clear, and eXact descriptionof the invention, such as willenable othersskilled in the art to .which it appertains to make and usethe same.

This invention relates to improvements in stayb'olt structures and moreparticularly to the closure devices for the bearing Sleeve,-the objectof the invention being to -provide a simple and efficient stayboltstructure which will facilitate the quick removal of the cap or closureto expose the head of the bolt for testing purposes, and which willoperate normally to hold the cap or closure tightly to its seat. j

With this and other objects in view, the invention consists Vin certainnovel features of construction and combinations of parts as hereinafterset forth and pointed out in the claims. I

In the accompanying drawings, Figure 1 is a sectional View illustratingan embodiment of my invention; Fig. 2 is a side elevation;y Fig. 3 is aplan view, and Figs. 4, 5, 6, 7, 8 and 9 are views of modifications.

1 represents a bearing sleeve which may be threaded exteriorly to screwthrough a suitable hole in a boiler sheet and having an interior curvedsurface 2 which serves as a bearing for the rounded or spherical head 3of a staybolt 4.

The bearing sleeve is provided at its outer end with a seat 5 for a capor closure 6," the latter being in the present instance, madeapproximately hemispherical and having such internal dimensions andconfiguration as to provide proper clearance for the bolt head. The capor closure is provided on its top with spaced lugs or ribs 7 for a purpose hereinafter explained.Y

A collar 8 is threaded on the outer end of the bearing sleeve andprovided with outwardly projecting lugs or ears 9 having perforations10. A clamping cross bar 11, preferably of spring metal passes over andin engagement with the cap between the lugs or ribs 7, the latterpreventing displacement of said cross bar. In Figs. 1 and 2 of thedrawing, the cross bar is made curved and its end portions pass looselythrough the perfor-ations 10. Y

It is apparent when the parts shall have been assembled as aboveexplained, and the collar 8 is given a partial turn (said collar beingmade with a hexagonal or 4other eX- ternal configuration to receive awrench), the cross bar 11 will be tightened on the cap or closure andthe latter thus will be pressed firmly against its seat on the bearingsleeve. By turning the collar 8 in the reverse direction, the cap willbe loosened and may be quickly removed to expose the head of the boltand permit the testing of the latter. The cap may be as quickly replacedand clamped in position to tightly close the end of the bearing sleeveover the bolt.

In the form of the invention shown in Figs. 4 and 5, the cap or closure6 is made ment 17 to receive an ear 18 on the cap. The

head or enlargement 17 is provided with transverse perforations toreceive a pin or key 19 and the ear 18 is made with a perforation 20appreciably greater in diameter than that of the pin or key and throughwhich the latter passes to loosely connect the cap to the cross bar.

In the form of the invention shown in Figs. 8 .and 9, the cross bar 21is made with arms 22 at its ends, said yarms having perforations 14 toreceive the pins 15 on the collar 8. The cross bar 21 is providedbetween its ends with a perforation 23 to loosely receive a teat 24projecting from the center of the cap 8, and said cap is provided withlateral arms 25 which project through suitable holes in the arms 22 ofthe cross bar 21.

Having fully described my invention what I claim as new and desire tosecure by Letters-Patent, is

1. Ina staybolt structure, the combination with a bearing sleeve, and aremovable cap to seat thereon, of a collar threaded said A and aremovable cap mounted on. said seat,

Aa collar threaded on said sleeve and having projections, a cross barpassing over said cap and engaging the projections on the collar, andmeans preventing relative lateral displacement of cap and cross bar.

3. In a sta-ybolt structure, the combination With -a hearingl sleevehaving a cap seat, andy a cap to rest on said seat, said cap havingspaced ribs on its top, of a collar threaded on the sleeve and havingvprojections, and a cross bar extending over the oap and engaging thesaine between the ribs thereon, the end sof said crossloar being looselyoo nnected with the rojections on said collar.

4. In a stayboli; structure, the combination with a bearing sleevehaving a. cap seat and a cap to rest on said seat, of a collar threaded;onf said sleeve, outwardly projectingperfoi-ated ears on said sleeve,and a cross bar engaging said Cap and loosely engaging the perforatedears on Said sleeve.

In. testimony whereof, I' have signed" this specification in thepresence of" tWosubscribing Witnesses. Y

ETHaN i@ Donne.4

Witnesses:

S. G. NOTTINGHAM, R. S. FERGUSON;

Copies of this,` patent may be obtained fol: five cents each, byaddressing: the (lammisfsimer` ot Patents,

Washington, D. GJ

